Chemistry Gk Questions 2024 for Competitive Exams & Chemistry Quiz for CDS, NDA, PSC, RRB, SSC, MTS, Govt Jobs
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Chemistry Gk Questions for Competitive Exams
Question 1. Which one of the following gases is released mostly from landfills in urban areas?
1. Nitrogen
2. Hydrogen
3. Methane
4. Oxygen
Question 2. Which one of the following is not an allotrope of carbon?
1. Coal
2. Diamond
3. Graphite
4. Graphene
Question 3. In paper manufacturing degumming of the raw material is done using ,
1. Sulphuric acid
2. Bleaching powder
3. Caustic soda
4. Nitric acid
Question 4. Species containing same number of electrons are called-
1. Isoelectronic
2. Isotopes
3. Isobars
4. Isotones
Chemistry Gk Questions for Competitive Exams 2024
Question 5. A device used for the measurement of radioactivity is-
1. Mass spectrometer
2. Cyclotrone
3. G.M.counter
4. Nuclear reactor
Question 6. The material which are weakly repelled by magnets are called-
1. Ferro-magnetic materials
2. A magnetic material
3. Para-magnetic materials
4. Dia-magnetic materials
Question 7. Catalyst is a substance which –
1. Increase the rate of reaction
2. Decrease the rate of reaction
3. Has no action on the rate of the reaction
4. None of these
Question 8. In MRI machine , which one of the following is used ?
1. sound wave
2. Ultra – sound wave
3. X – ray
4. Magnetic wave
General knowledge Chemistry Questions 2024
Question 9. Which of the following chemical is used in voting ink ?
1. silver nitrate
2. Silver bromide
3. Silver chloride
4. Silver sulphate
Question 10. Which of the following has no mass ?
1. Alpha radiations
2. Beta radiations
3. Gamma radiations
4. Cosmic radiations
Question 11. Non – conductors , whose polarization is caused by an electric field , are known as –
1. Semi – conductors
2. Super – conductors
3. Dielectrics
4. Resistive conductors
Question 12. Which was the first element to be artificially produced ?
1. Technetium
2. Francium
3. Einsteinium
4. Promethium
Simple Chemistry Gk Questions for Competitive Exams
Question 13. The two element having unequal number of electrons but same atomic mass are called –
1. Isotonic
2. Isoneutronic
3. Isotopes
4. Isobars
Question 14. Detergents used for cleaning clothes and utensils contain –
1. Nitrates
2. Bicarbonates
3. Sulphonates
4. Bismuthates
Question 15. which matter is used in storage batteries
1. Copper
2. Lead
3. Aluminium
4. Zinc
Question 16. Maximum Iron is obtained from the ore of –
1. Hematite
2. Magnetite
3. Siderite
4. Iron pyrite
Chemistry Gk Questions for Competitive Exams
Question 17. Which variety of Coal contains recognizable traces of the original plant material ?
1. Anthracite
2. Lignite
3. Peat
4. Bitumen
Question 18. ‘Red Ink’ is prepared from –
1. Phenol
2. Aniline
3. Congo red
4. Eosin
Chemistry Questions for Competitive Exams
Q: Which one of the following is also called Stranger Gas?
Ans: Xenon
Q: The alcohol used in power alcohol is
Ans: ethyl alcohol
Q: Which one of the following gases is readily soluble in water at room temperature?
Ans: . carbon dioxide
Q: For Which one of the following is the density maximum ?
Ans: Water
Q: Which is used to produce artificial rain?
Ans: silver iodide
Q: Which one of the following is the softest?
Ans: Iron
Chemistry Questions for Competitive Exams
Q: Vinegar is trade name of
Ans: Acetic acid
Q: Nail polish remover contains
Ans: Acetone
Q: The chemical used as a fixer in photography is
Ans: sodium thiosulphate
Q: First atomic theory was proposed by
Ans: John Dalton
Q: pH of water is
Ans: 7
Chemistry Gk for Competitive Exams
Q: Which one of the following is present in the emission from “unleaded petrol”?
Ans: hydrocarbons
Q: The number of moles of solute present in 1 kg of a solvent is called its
Ans: molality
Q: The metal used to recover copper from a solution of copper sulphate is
Ans: Fe
Q: The metallurgical process in which a metal is obtained in a fused state is called
Ans: smelting
Q: The monomer of polythene is
Ans: ethylene
Q: Talc contains which one of the following ?
Ans: magnesium,silicon,oxygen
Chemistry Gk for Competitive Exams
Q: The most malleable metal is
Ans: gold
Q: The most extensive, commercially useful source of thorium as monazite sand occurs in India at
Ans: Travancore coast
Q: The hardest form of carbon is
Ans: diamond
Q: Rare gases are
Ans: di atomic
Q: Curd is sour due to presence of
Ans: Lactic acid
Q: Acid rain contains high levels of
Ans: carbolic acid
Q: The maximum number of covalent formed by nitrogen is
Ans: 4
Q: The element used in lead pencils is
Ans: carbon
Q: The metal that is usually extracted from sea water is
Ans: Mg
Chemistry Gk for Competitive Exams
Q: The inert gases are ____ in water
Ans: sparingly soluble
Q: A Gold Ring which is 50% pure. Its purity can be alternatively shown as __:
Ans: 12 Karat
Q: Presence of which among the following minerals in Banana makes them slightly radioactive?
Ans: Pottasium
Q: Which of the following types a PEM cell belongs to?
Ans:
Q: Which one of the following non metals is not a poor conductor of electricity
Ans: Selenium
Q: Which among the following is the objective of the Methyl tert-butyl ether (MTBE) mixing with Petroleum?
Ans: Raise Octane Number
Q: Which of the following statements is correct about Diborane?
Ans: It is a highly toxic gas
Chemistry Gk for Competitive Exams
Q: Which one of the following is not a chemical change ?
Ans: Crystallization of table salt from sea water
Q: Which of the following molecules have a T-shape arrangement?
Ans: Chlorine Trifluoride
Q: CuSO4.5H2O is the chemical formula of
Ans: Blue vitriol
Q: Brass is an alloy of
Ans: copper and zinc
Q: Commercially, sodium bicarbonate is known as
Ans: Baking soda
Q: Group 0 elements are __________
Ans: Unreactive non metals
Q: Which acid is present in lemon
Ans: citric acid
Q: Hydrogen bomb is based on the principle of
Ans: nuclear fusion
Q: Which metal is commonly used for making an electromagnet?
Ans: Iron
Chemistry Gk for Competitive Exams CDS, NDA, PSC, RRB, SSC, MTS, GOVt Jobs
Q: Which of the following is a non metal that remains liquid at room temperature ?
Ans: Bromine
Q: Which one of the following is not a mixture
Ans: mercury
Q: Temporary hardness is due to the presence of
Ans: calcium bicarbonate
Q: What is the main constituent of coal gas?
Ans: Methane
Q: The isotopes of chlorine with mass number 35 and 37 exist in the ratio of
Ans: 3:1
Q: The chemical used as a fixer in photography is
Ans: sodium thiosulphate
Q: Alkali metals are
Ans: reactive metals.
Q: Natural rubber is a polymer derived from
Ans: isoprene
Q: The acid present in lemon is
Ans: citric acid
Q: Lysergic acid diethylamide (LSD) is a drug used as a
Ans: Hallucinogencorrect
Q: Which one of the following non metals is not a poor conductor of electricity
Ans: Selenium
Q: Horizontal rows in the periodic table are called _________
Ans: Periodscorrect
Q: Who invented Bakelite, which is one of the first commercially successful plastics of the world?
Ans: Leo Baekeland
Q: Which of the following compound is not used as an an alkali?
Ans: Nitrogen hydroxide
Q: Tell the composition of soap?
Ans: Sodium salt with fatty acids and Potassium salt with fatty acids
Q: Bio-chemical compounds are used as….
Ans: Food preservatives, Skin Treatments and Cooking Oils
Q: As a vegetable preservative poly______ foam is used.
Ans: Urethanes
Q: In which form the chemical compound RDX is used?
Ans: As an explosive
Chemistry Gk Questions for Competitive Exams CDS, NDA, PSC, RRB, SSC, MTS, GOVt Jobs
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Que: One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
Ans: 250 grams
Que: If you fill a glass to the brim with ice water and the ice melts, what will happen?
Ans: The water level will drop slightly as the ice melts.
Que: Noble gases are inert because they have completed outer electron shells. Which of these elements isn’t a noble gas?
Ans: Chlorine
Que: Which was the first metal that was used by man?
Ans: Copper
Que: The nucleus of a hydrogen atom consists of:
Ans: 1proton
Que: Which is the gas that is used for artificial ripening of green fruit?
Ans: Ethylene
Que: Which is the most commonly used bleaching agent
Ans: Chlorine
Que: Horizontal rows in the periodic table are called
Ans: Periods
Que: Alkali metals belong to which group in periodic table?
Group 1
Que: What is the relative charge of Proton and Electron?
Ans: +1, -1
Que: Discovery of the nucleus of an atom was due to the experiment carried out by
Rutherford
Que: Concentrated solution of sodium chloride is called
Ans: Brine
Que: An aqueous solution of sulphurdioxide forms
Ans: Sulphurous acid
Que: Which of the following is a liquid at room temperature?
Ans: Bromine
Que: Which is not a type of elements ?
Ans: Gases
Que: Human bone does not contain
Ans: oxygen
Que: Water drops are spherical because of ?
Ans: surface tension
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Chemistry Quiz for CDS
Q: What is formula of urea
Ans: CH₄N₂O
Q: Formula of Citric acid
Ans: C₆H₈O₇
Q: What elements are in citric acid?
Ans: Citric acid is an alpha-hydroxy acid with a three carbon skeleton, which has three carboxylic acid groups (COOH), and one hydroxyl group (OH). Occurrence: Citric acid occurs naturally in many fruits and vegetables, with the largest amounts in citrus fruits such as oranges, lemons and limes.
Q: What is the function of citric acid?
Ans: Citric acid is a weak organic acid found in citrus fruits. It is a natural preservative and is also used to add an acidic (sour) taste to foods and soft drinks. In biochemistry, it is important as an intermediate in the citric acid cycle and therefore occurs in the metabolism of almost all living things.
Q: What is Molar mass of Citric acid
Ans: 192.124 g/mol
Q: What is Melting pointof Citric acid
Ans: 153 °C
Q: What is Boiling pointof Citric acid
Ans: 310 °C
Q: What is Density of Citric acid
Ans: 1.66 g/cm³
Q: What is the chemical name for urea?
Ans: Carbamide
Q: Who discovered urea?
Ans: Friedrich Wohler